Evaluation of image quality metrics for the prediction of subjective best focus

Optometry and Vision Science : Official Publication of the American Academy of Optometry
Marina KilintariHarilaos S Ginis

Abstract

Seven existing and three new image quality metrics were evaluated in terms of their effectiveness in predicting subjective cycloplegic refraction. Monochromatic wavefront aberrations (WA) were measured in 70 eyes using a Shack-Hartmann based device (Complete Ophthalmic Analysis System; Wavefront Sciences). Subjective cycloplegic spherocylindrical correction was obtained using a standard manifest refraction procedure. The dioptric amount required to optimize each metric was calculated and compared with the subjective refraction result. Metrics included monochromatic and polychromatic variants, as well as variants taking into consideration the Stiles and Crawford effect (SCE). WA measurements were performed using infrared light and converted to visible before all calculations. The mean difference between subjective cycloplegic and WA-derived spherical refraction ranged from 0.17 to 0.36 diopters (D), while paraxial curvature resulted in a difference of 0.68 D. Monochromatic metrics exhibited smaller mean differences between subjective cycloplegic and objective refraction. Consideration of the SCE reduced the standard deviation (SD) of the difference between subjective and objective refraction. All metrics exhibited similar perfor...Continue Reading

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Citations

Apr 5, 2017·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Renfeng XuArthur Bradley
May 24, 2020·Scientific Reports·Radhika RampatDamien Gatinel
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Jun 4, 2019·Translational Vision Science & Technology·Ayeswarya RavikumarHeather A Anderson
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